Engines with lack bottom end power?
Even if you look at the stock 273 commando build it makes like 275tq @ 4000 rpm and pretty flat from 2700-4300 rpm, a 2bbl version would make even less torque and compare the 273/292 473hp @ 7900 rpm and 334 tq @ 7100 rpm, makes 255 tq @ 3500 rpm less than a 20 tq difference. I imagine 473hp would need high stall and deep gears not to fall on it's face even though it's probably on par with a 2bbl 273 and way above /6 torque at low rpm's especially 170 making even way less , my 380tq is miles above this.